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Atom Transfer Radical Polymerization of Functionalized Vinyl Monomers Using Perylene as a Visible Light Photocatalyst
Published on: April 22, 2016
Visible light intensity dependent negative photochromism of a binaphthyl-bridged phenoxyl-imidazolyl radical complex
Izumi Yonekawa1, Katsuya Mutoh, Jiro Abe
1Department of Chemistry, School of Science and Engineering, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252-5258, Japan. jiro_abe@chem.aoyama.ac.jp.
Abstract:
We herein report a novel biphotochromic molecule composed of two fast negative photochromic phenoxyl-imidazolyl radical complex units showing incident light intensity dependence of the photochemical reaction. The electronic coupling between the two fast negative photochromic units gives a non-linear photoresponse; weak- and intense-visible light irradiation proceed the one-photon and two-photon photochemical reactions, respectively. The solution of the stepwise negative photochromic molecule changes to colorless only by excitation with intense visible light.
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